Reconstruction quality assessment with local non-uniformity in nuclear imaging
AssigneeSiemens Medical Solutions USA, Inc.
InventorsJun Ma, Alexander Hans Vija
Life of this patent
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Abstract
Reconstruction quality is assessed in medical imaging. An amount of local non-uniformity in a distribution of a statistical measure (e.g., MCDF) is determined. The amount indicates a level of reconstruction quality. A more easily understood amount rather than a rendering of MCDF and/or the amount being a function of local artifacts aids a radiologist in recognizing reconstruction quality and determining whether different reconstruction is warranted.
Claims20
A method for assessment of reconstruction quality in medical imaging, the method comprising:
- detecting, with a nuclear imaging detector, emissions from a patient;
- reconstructing an image object from the emissions;
- forward projecting from the image object to a data model in data space;
- calculating a modified cumulative distribution function from the data model, the modified cumulative distribution function having a distribution of values across pixels or voxels;
- determining a value for a level of local non-uniformity in the distribution of the modified cumulative distribution function;
- and
- outputting an indication of a quality of the reconstructing, the indication being a function of the value.
A non-transitory computer readable storage medium having stored therein data representing instructions executable by a programmed processor for assessment of reconstruction quality in nuclear imaging, the storage medium comprising instructions for:
- calculating statistical measures of differences between a data model of computed tomography and detected emissions in the nuclear imaging;
- identifying variation in the statistical measures;
- and
- transmitting an indication of the reconstruction quality in the nuclear imaging, the reconstruction quality based on the variation.
A nuclear imaging system comprising:
- a detector for detecting signals from a patient;
- a reconstruction processor configured to reconstruct an image of the signals from the patient and to quantify an amount of non-uniformity in a statistical measure of difference between a data model and the detected signals;
- and
- a display configured to display the image and a quality of the reconstruction, the quality being a function of the amount of the non-uniformity.
Dependencies are inferred from the claim text.